Attic Live Load

Strengthening attic joists for live loads by sistering if the attic joists are not adequate one way to strengthen the floor for live loads is to sister the old joists.

Attic live load.

Minimum live loads for garages having trucks or buses shall be as specified in table 1607 6 but shall not be less than 50 psf 2 40 kn m 2 unless other loads are specifically justified and approved by the commissioner. Other uses for attics and lofts include a live load plus a 10 psf dead load for the weight of the floor support system floor sheathing sheetrock on the underside and any insulation. Live load on attic floor local requirements. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of other elements in the load path.

1607 12 4 awnings and canopies. An extensive rewrite of footnotes b and g though mostly editorial clarifi es the intent of provisions for determining when an uninhabitable attic must be designed for a minimum live load of 20 psf for limited storage. In sleeping only areas a 30 psf live load is required. Other residential rooms 40 psf.

Sistering is the process of adding a new joist next to each existing joist. Offices require 50 psf. Ft dead load of roof of wood shingle construction 10 lbs. Increasing the total weight on the floor to 4 480 pounds however results in a live load of 40 psf which is beyond the floor s load capacity.

With an evenly distributed live load of 30 psf which the tables show the floor is able to support the total weight on the floor would be about 3 360 pounds. 3the transverse wind load for stud design is based on a localized component and cladding wind pressure. The weight of all landscaping materials shall be considered as dead load and shall be computed on the basis of saturation of the soil. D w provides an adequate and.

The uniform design live load in unoccupied landscaped areas on roofs shall be 20 psf 0 958 kn m2.